EP2027609A2 - Alimentation thermoelectrique - Google Patents

Alimentation thermoelectrique

Info

Publication number
EP2027609A2
EP2027609A2 EP07795463A EP07795463A EP2027609A2 EP 2027609 A2 EP2027609 A2 EP 2027609A2 EP 07795463 A EP07795463 A EP 07795463A EP 07795463 A EP07795463 A EP 07795463A EP 2027609 A2 EP2027609 A2 EP 2027609A2
Authority
EP
European Patent Office
Prior art keywords
thermoelectric
type
plane
power supply
energy management
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07795463A
Other languages
German (de)
English (en)
Other versions
EP2027609B1 (fr
EP2027609A4 (fr
Inventor
Ingo Stark
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Veriteq Corp
Original Assignee
Digital Angel Corp
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Filing date
Publication date
Application filed by Digital Angel Corp filed Critical Digital Angel Corp
Publication of EP2027609A2 publication Critical patent/EP2027609A2/fr
Publication of EP2027609A4 publication Critical patent/EP2027609A4/fr
Application granted granted Critical
Publication of EP2027609B1 publication Critical patent/EP2027609B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device

Definitions

  • the present invention pertains generally to thermoelectric devices and, more particularly, to a self-sufficient thermoelectric power supply that is specifically adapted to produce a relatively high-voltage power output such as for powering microelectronic devices.
  • batteries and solar cells are traditional power sources for such microelectronic devices.
  • the power that is supplied by batteries dissipates over time requiring that the batteries be periodically replaced.
  • Solar cells although having an effectively unlimited useful life, may only provide a transient source of power as the sun or other light sources may not always be available.
  • solar cells require periodic cleaning of their surfaces in order to maintain efficiency of energy conversion.
  • Thermoelectric generators are self-sufficient energy sources that convert thermal energy into electrical energy according to the Seebeck effect - a phenomenon whereby heat differences may be converted into electricity due in large part to charge carrier diffusion in a conductor. Electrical power may be generated under the Seebeck effect by utilizing thermocouples which are each comprised of a pair of dissimilar metals (n-type and p-type) joined at one end. N-type and p-type refers to the respective negative and positive types of charge carriers within the material.
  • thermoelectric generator may be incorporated into the wristwatch to take advantage of the dissipated or waste heat and generate a supply of power sufficient to operate the wristwatch as a self- contained unit.
  • many microelectronic devices that are similar in size to a typical wristwatch require only a small amount of power and therefore may also be compatible for powering by a thermoelectric generator.
  • thermoelectric generators This reduction in power requirements for such electronic devices has enabled the employment of alternative energy sources such as thermoelectric generators.
  • thermoelectric generators When used as thermal energy harvesting devices for recovering thermal energy as dissipated heat which is typically lost to the environment, such thermoelectric generators may be utilized to power microelectronics or sensor systems. As the functional density of such modern electronic devices increases due in part to the integration of the many subcomponents that make up such electronic devices, power consumption of the devices has shrunk to the micro-watt and nano- watt level. Often however, a higher power is required for many microelectronic devices. This higher power requirement is often in the milli-watt range.
  • thermoelectric power supply that is specifically adapted to convert thermal energy into electrical energy from only small temperature gradients such as those occurring due to body or waste heat. More particularly, the present invention provides thermoelectric power supply that is capable of converting thermal energy into a relatively high power output with voltages in the Volt-range and which provides such power in a stable and reliable manner in order to power microelectronic devices such as sensor systems.
  • the invention comprises an in-plane thermoelectric generator, a cross-plane thermoelectric generator, an initial energy management assembly, a voltage converter and a final energy management assembly.
  • the in-plane thermoelectric generator may be constructed similar to that shown and described in
  • thermoelectric generator is generally constructed having a high number of thermocouples arranged in series and deposited on a substrate in order to produce a relatively high thermoelectric voltage but with low power output.
  • the initial energy management system receives the relatively high voltage and low power output from the in-plane thermoelectric generator and is specifically configured to rectify the thermoelectric voltage, protect against excess voltage via a diode, and store or accumulate a sufficient amount of energy in an energy storage element in order to activate the voltage converter.
  • the initial energy management assembly may further include a voltage detector which is adapted to release power to the voltage converter upon obtaining a certain voltage threshold.
  • the voltage converter is specifically adapted to be activated or powered by voltage from the in-plane thermoelectric generator after processing by the initial energy management assembly.
  • the voltage converter then is capable of converting the low voltage output from the cross-plane thermoelectric generator into a relatively high voltage using the principle of voltage multiplication such as by using a charge pump. More specifically, the voltage converter is adapted to multiply the relatively low thermoelectric voltage output of the cross-plane thermoelectric generator.
  • the cross-plane thermoelectric generator is adapted to generate a relatively high power output but at low voltage.
  • the high power output is provided at a relatively low voltage at small temperature gradients such that the voltage is too low to drive most modern electronic circuitry.
  • the in-plane thermoelectric generator with the cross-plane thermoelectric generator, the combined advantages of each may be utilized to overcome the individual disadvantages in order to provide a thermoelectric power supply having an electric power output that is compatible for use in electronic devices requiring a high power consumption.
  • thermoelectric power supply of the present invention after multiplying the relatively low voltage provided by the cross-plane thermoelectric generator, the voltage converter supplies electrical energy directly to the final energy management assembly which, like the initial energy management assembly, also rectifies and limits the voltage, charges an integrated energy storage element, detects the charging state of the stored energy via a voltage detector for release to an external power receiver such as a microelectronic device.
  • the initial energy management assembly is used to initially activate the voltage converter after which the initial energy management assembly may be used to provide energy to the final device.
  • FIG. 1 is a schematic illustration of a thermoelectric power supply in one embodiment and which is comprised of an in-plane thermoelectric generator, a cross- plane thermoelectric generator, an initial energy management assembly, a voltage converter and a final energy management assembly;
  • Figure 2 is a perspective view of the in-plane thermoelectric generator illustrating the basic configuration of p-type and n-type thermoelectric legs deposited onto a substrate using thin film technologies
  • Figure 3 is a perspective view of the cross-plane thermoelectric generator wherein a spaced pair of heat couple plates is configured in a checkerboard arrangement of p-type and n-type thermoelectric legs;
  • FIG. 4 is a schematic diagram of the thermoelectric power supply in an alternative embodiment wherein the in-plane and cross-plane thermoelectric generators are constructed as separate elements and wherein the initial energy management assembly, voltage converter and final energy management assembly are integrated, for example, into a unitary electronic assembly; and
  • FIG 5 is a schematic diagram of the thermoelectric power supply in a further alternative embodiment wherein the in-plane and cross-plane thermoelectric generators share the same heat couple plates similar to that illustrated in Figure 1 but wherein the initial and final energy management assemblies are integrated with the voltage converter into a unitary electronic assembly.
  • thermoelectric power supply 10 that is specifically adapted to convert thermal energy into electrical energy from only small temperature gradients such as emitted by the body or waste heat.
  • the power supply 10 of the present invention is adapted to produce electrical energy from such small temperature gradients with a high power output and with a stable and relatively high level voltage sufficient to power modern microelectronic devices and sensor systems.
  • thermoelectric power supply 10 comprises an in- plane thermoelectric generator 12, a cross-plane thermoelectric generator 14, an initial energy management assembly 40, a voltage converter 58 and a final energy management assembly 64.
  • the in-plane thermoelectric generator 12 provides the advantage of generating a relatively high voltage at even small temperature gradients.
  • the in-plane thermoelectric generator 12 Arranged with a relatively high number of thermocouples 38 connected in series, the in-plane thermoelectric generator 12 has a relatively high thermal resistance due to the arrangement of relatively long and thin n-type and p-type thermoelectric legs 34, 36 which are disposed in generally parallel and spaced relation to one another. More specifically, the length of such thermoelectric legs is in the millimeter range wherein the thickness of such legs is in the order of magnitude of microns up to tens of microns. In this regard, the ratio of length of the thermoelectric legs to the thickness thereof is such that the amount of heat flowing through the in- plane thermoelectric generator 12 is relatively small.
  • the arrangement of the in-plane thermoelectric generator 12 results in the creation of a relatively high electrical resistance due as well as to the relatively large number of thermocouples 38 that are electrically connected in series.
  • high electrical resistance is a result of the relatively large ratio of length of the thermoelectric legs to cross-section thereof. This high electrical resistance results in a relatively low power output.
  • the in-plane thermoelectric generator 12 arrangement results in a relatively low level of efficiency as a result of parasitic heat flow through the substrate 26 onto which the n-type and p-type thermoelectric legs 34, 36 are deposited.
  • thermoelectric generator 12 configurations As was earlier mentioned, a common arrangement for in-plane thermoelectric generator 12 configurations is to construct such devices as a foil segment 24 or series of foil segments 24 having a relatively large number of thermocouples 38 which are themselves electrically connected in series.
  • the p-type and n-type thermoelectric legs 36, 34 which make up the thermocouples 38 are connected using metal bridges 30 and metal contacts 32 as is shown in Figure 2.
  • Such metal bridges 30 and metal contacts 32 may be deposited onto the substrate 26 after deposition of the p-type and n-type thermoelectric legs 36, 34 in order to form the thin film thermoelectric structure that makes up the in-plane thermoelectric generator 12 configuration.
  • the in-plane thermoelectric generator may be fabricated by a number of alternative technologies.
  • the in-plane thermoelectric generator may be fabricated using MEMS silicon-based technology such as that described in the document entitled “A Thermoelectric Converter for Energy Supply” by H. Glosch et al. and reprinted in the publication entitled Sensors and Actuators, No. 74 (1999) Pages 246-250.
  • the in-plane thermoelectric generator may be fabricated using silicon technology such as that described in the document entitled “Miniaturized Thermoelectric Generators Based on Poly-Si and PoIy-SiGe Surface Micromachining” by M. Strasser et al. of Infineon Technologies A.G., Wireless Products, Microsystems and Kunststoff University of Technology, Institute for Physics of Electrotechnology.
  • thermoelectric generator A further description of silicon-based technology for fabricating the in-plane thermoelectric generator is provided in the document entitled "Analysis of a CMOS Low Power Thermoelectric Generator” by M. Strasser et al. of Infineon Technologies and Kunststoff University of Technology.
  • the in-plane thermoelectric generator may further fabricated using electroplating technology similar to that disclosed in the document entitled “Microfabrication of Thermoelectric Generators on Flexible Foil Substrates as Power Source for Autonomous Microsystems” by Wenmin Qu et al. and published in The Journal of Micromechanics and Microengineering, 11 (2001), pages 146-152.
  • the relatively high density of thermocouples 38 can be achieved utilizing stacking of the substrates 26.
  • the foil segment 24 or substrate 26 may be rolled into a spiral shape in order to produce a round- shaped thermoelectric generator similar to that disclosed in U.S. Patent Publication Serial No. 20060151021 and entitled LOW POWER THERMOELECTRIC GENERATOR.
  • a spaced pair of heat couple plates 22 i.e., top and bottom plates
  • thermoelectric generator 12 Electrical connection of the in-plane thermoelectric generator 12 to the initial energy management assembly 40 can be facilitated using at least one of the heat couple plates 22 (i.e., one of the top and bottom plates) or by directly connecting opposing ends of the thermocouple chain to the initial energy management assembly 40.
  • the top plate and bottom plate are preferably fabricated of electrically conductive material such as metallic material.
  • An inner surface of the heat couple plates 22 is preferably coated with a non- electrically conductive coating except at the extreme ends of the series of alternating n-type and p-type thermoelectric legs 34, 36 wherein the non-electrically conductive coating is locally omitted.
  • the heat couple plates 22 are, in turn, electrically connected to respective ones of opposing ends of the series of alternating n-type and p-type thermoelectric legs 34, 36.
  • the heat couple plates 22 are then electrically connectable to the initial energy management assembly 40 similar to the electrical connection of a watch battery to a watch.
  • the in-plane thermoelectric generator 12 may be connected to the initial energy management assembly 40 by direct connection to the ends of the thermocouple chain of the in-plane thermoelectric generator 12.
  • the heat couple plates 22 i.e., top and bottom plated
  • the heat couple plates 22 may be fabricated of electrically non-conductive material such as relatively-highly-thermally- conductive ceramic material or other suitable material with a relatively high thermal conductivity.
  • at least one of the inside surfaces of the heat couple plates 22 may be coated with a non-electrically conductive coating.
  • the thermally conductive glue or adhesive which bonds the top and bottom plates to the foil segments as described in U.S. Patent No. 6,958,443 is preferably electrically non-conductive and therefore eliminates the need for a separate non-electrically conductive coating.
  • the heat couple plates 22 i.e., top and bottom plates
  • the thermoelectric power supply 10 may include electrically conductive wiring for connecting the respective ones of opposing ends of the series of alternating n-type and p-type thermoelectric legs 34, 36 to the initial energy management assembly 40.
  • its configuration as shown in Figure 3 may be fabricated using bulk polycrystalline material such as is utilized in standard Peltier coolers known in the art.
  • the length of the p-type and n-type thermoelectric legs 36, 34 is in the millimeter range for configurations utilizing bulk polycrystalline material.
  • the length of the thermoelectric legs may be in a range of several tens of microns.
  • thermoelectric generator 14 provides a relatively low electrical resistance due to the relatively small quantity of thermocouples 38 that are arranged in series.
  • low electric resistance of the cross-plane thermoelectric generator 14 configuration is a result of the relatively small ratio of length of n-type and p-type thermoelectric legs 34, 36 to cross-sections thereof.
  • the relatively small aspect ratio of the thermoelectric legs in the cross-plane thermoelectric generator 14 results in a relatively high power output.
  • the cross-plane thermoelectric generator 14 provides a relatively high efficiency capability for converting thermal energy into electrical energy. This is a result of the lack of parasitic heat flow through the substrate 26 as is present in the in-plane thermoelectric generator 12 configuration.
  • this arrangement results in heat flowing only through the thermoelectric legs.
  • the advantages provided by the small aspect ratio i.e., low electrical resistance and high power output
  • the cross-plane thermoelectric generator 14 exhibits relatively low thermal resistance due to the same low aspect ratio.
  • thermoelectric legs More specifically, the relatively low ratio of length of the thermoelectric legs to cross-section thereof leads to low thermal resistance resulting in a relatively large amounts of heat flow through the device.
  • An unfavorable characteristic of the cross- plane thermoelectric generator 14 are associated with the relatively limited quantity of thermocouples 38 that may be electrically connected in series while still minimizing, the overall size of the device. This limited number of thermocouples 38 results in a relatively low voltage output at small temperature gradients despite the high power capabilities.
  • the cross-plane thermoelectric generator 14 may be fabricated by a variety of thin film technologies described in the documents mentioned below.
  • the cross-plane thermoelectric generator 14 may be fabricated by using thin film technologies described in the document entitled "Micropelt Miniaturized Thermoelectric Devices: Small Size, High Cooling Power Densities, Short Response Time” by H. Boettner of the Fraunhofer Institute Physikalische Messtechnik (IPM), Freiburg, Germany, or in the article entitled “Micropelt: State of the Art, Roadmap and Applications” also by H. Boettner as well as that described in the document entitled “New Thermoelectric Components Using Microsystem Technologies” also by H. Boettner et al.
  • thermoelectric generator 14 Various electroplating technology techniques (e.g., galvanic processing) for the cross-plane thermoelectric generator 14 can be used such as is described in the disclosure entitled "Thermoelectric Microdevice Fabricated by a MEMS-Like Electrochemical Process” by G. Jeffrey Snyder et al. of Jet Propulsion Laboratory, California Institute of Technology and published on-line on 27 July 2003, incorporated by reference in its entirety.
  • the cross-plane thermoelectric generator 14 may be fabricated using bulk polycrystalline thermoelectric material and mechanical cutting technology of bulk polycrystalline thermoelectric material.
  • the bulk, polycrystalline thermoelectric material may be prepared from melts (i.e., liquids) and/or by powder technology techniques and/or by mechanical alloying.
  • thermoelectric power supply 10 of the present invention combines in-plane and cross-plane thermoelectric generators 12, 14 in a unique arrangement that takes advantage of the benefits of each device in order to provide electrical power output that is compatible for many microelectronic devices that consume relatively high power.
  • the in-plane thermoelectric generator 12 configuration is capable of providing the necessary voltage for operating many modern microelectronic devices in the 1.5 to 3 volt range but are incapable of producing the required amount of power due to the relatively low current at which such electrical energy is provided.
  • Such low electrical current is a result of the high electric internal resistance of the in-plane thermoelectric generator 12 design.
  • the cross-plane thermoelectric generator 14 configuration is capable of producing the amount of power compatible for many electronic devices 62 due to its low internal resistance which results in a relatively high electrical current.
  • the power output of the cross-plane thermoelectric generator 14 at the relatively small temperature gradients results in a thermoelectric voltage that is generally too low for operating many electronic circuitry.
  • thermoelectric power supply 10 of the present invention by including the voltage converter 58 in the thermoelectric power supply 10 of the present invention, the relatively high power output at low voltage of the cross-plane thermoelectric generator 14 may be exploited by the voltage converter
  • the final energy management assembly 64 is connected to the voltage converter 58 and receives power therefrom.
  • the voltage converter 58 is activated or powered by electrical energy produced initially by the in- plane thermoelectric generator 12 after processing thereof by the initial energy management assembly 40. More specifically, the final energy management assembly 64 is adapted to rectify and limit voltage received from the cross-plane thermoelectric generator 14, charge an energy storage element 50 such as a capacitor 52 or a rechargeable thin film battery 54 contained within the final energy management assembly 64, and detect the charging state of the energy storage element 50 utilizing a voltage detector 56.
  • the detection capability of the voltage detector 56 allows the final energy management assembly 64 to release power to the electronic device 62 upon detection of a sufficient level of electrical energy in the energy storage element 50.
  • the final energy management assembly 64 releases power to a device such as a microelectronic device in order to power the device which may be any number of applications including, but not limited to, microelectronics, and sensor systems.
  • a portion of the energy released by the final energy management assembly 64 may be re-circulated back to the voltage converter 58 in order to provide power for its voltage multiplication purposes.
  • the power requirements as well as size and, ultimately, cost, of the in-plane thermoelectric generator 12 may be reduced.
  • the power requirements, size and cost of the initial energy management assembly 40 may also be reduced as the initial energy management assembly 40 would then only be required to operate to initiate or start the voltage converter 58 after which operation of the initial energy management assembly 40 would no longer be required.
  • power produced by the initial energy management assembly 40 is not required to drive the voltage converter 58, such power may be delivered to the final energy management assembly 64 where it may be stored in the energy storage element 50.
  • thermoelectric power supply 10 of the present invention may be configured to include a relatively large energy storage element 50 such as a rechargeable thin film battery 54 or a capacitor 52 in electrical communication with the final energy management assembly 64.
  • a relatively large energy storage element 50 such as a rechargeable thin film battery 54 or a capacitor 52 in electrical communication with the final energy management assembly 64.
  • Such relatively large energy storage element 50 may be configured to store excess energy not required by the final electronic device 62 and/or voltage converter 58.
  • the initial energy management assembly 40 functions to rectify and limit the thermoelectric voltage produced by the in-plane thermoelectric generator 12, protect against the generation of excess voltage, initially provide energy storage capability in the form of an energy storage element 50, as well as provide the capability of voltage regulation in order to regulate the point at which power is released to the voltage converter 58.
  • Rectifying of the thermoelectric voltage may be facilitated through the use of a diode 44 in order to provide voltage with only one polarity regardless of the direction of temperature flow or temperature gradient.
  • the rectifier 42 may be adapted to enable exploitation of temperature gradient regardless of the direction of heat flow by utilizing a diode bridge 46.
  • Further embodiments may include at least one diode to block the discharge of energy storage by the in-plane and/or cross-plane thermoelectric generators 12, 14.
  • the initial energy management assembly 40 may also provide excess voltage protection such as by utilizing a Zener diode, a single diode 44 or a plurality of diodes 44 arranged in series in a manner well known in the art.
  • Initial energy storage elements 50 may include small capacitors 52 or a rechargeable thin film battery configured to accumulate sufficient energy in order to activate the voltage converter 58. Voltage detection may be facilitated through the use of a switch or switches at defined voltage thresholds which correspond to the amount of energy stored. Over a pre-determined threshold, charges in the storage element may be released as power to the voltage converter 58. Under that pre-determined threshold, electrical current flow may be interrupted or prevented.
  • the voltage converter 58 is specifically adapted to convert the relatively low voltage but high power output of the cross-plane thermoelectric generator 14 into a usable high voltage using the principle of voltage multiplication in the manner of a charge pump 60.
  • the thermoelectric power supply 10 is capable of powering or driving electronics such as energy management systems, a final electronic application and/or the voltage converter 58 itself.
  • the final energy management assembly 64 may be adapted to provide similar capabilities as was described above for the initial energy management assembly 40.
  • the final energy management assembly 64 is preferably adapted to rectify thermoelectric voltage in order to provide voltage at one polarity for heat flow in opposite directions utilizing a diode 44 or diode bridge 46.
  • the final energy management assembly 64 is also preferably adapted to provide for excess voltage protection to prevent damage to the final electronic application as well as including an energy storage element 50 such as a small capacitor 52 or rechargeable thin film battery 54 in order to power the application to which the thermoelectric power supply 10 is connected.
  • an additional energy storage element 50 such as a relatively large rechargeable thin film battery 54 or capacitor 52 may be integrated into the final energy management assembly 64 in order to allow for accumulation of excess energy that is not required to power the electrical device.
  • the final energy management assembly 64 may further include a voltage detector 56 to determine and regulate the release of energy to the microelectronic device or application to which the thermoelectric power supply 10 is connected.
  • the features of the initial energy management assembly 40 and final energy management assembly 64 are optimized according to the specific application and thermal environment in which the thermoelectric power supply 10 operates. More specifically, the above described features of the initial and final energy management assemblies may be reduced according to the requirements of the device to be powered by the thermoelectric generator as well as in accordance with the characteristics of the thermal environment within which the thermoelectric power supply 10 operates.
  • thermoelectric power supply 10 Alternative embodiments or arrangements for the components of the thermoelectric power supply 10 are shown in Figures 4 and 5.
  • Figure 4 shown is an arrangement wherein the in-plane thermoelectric generator 12 is constructed as a separate entity from the cross-plane thermoelectric generator 14.
  • Figure 4 shown is an arrangement wherein the in-plane thermoelectric generator 12 is constructed as a separate entity from the cross-plane thermoelectric generator 14.
  • thermoelectric generators 12, 14 may be configured to share a common heat source 18 and heat sink 20.
  • thermoelectric power supply 10 may be arranged such that the in-plane and cross-plane thermoelectric generators 12, 14 have separate heat couple plates 22 for heat source
  • Figure 1 illustrates the other components of the initial and final energy management assemblies 40, 64 and voltage converter 58 being provided as separate components which are electrically connected together.
  • thermoelectric power supply 10 may be arranged such that the in-plane and cross-plane thermoelectric generators 12, 14 share a common heat source 18 and heat sink 20 (i.e., common heat couple plates 22) as opposed to the separate heat couple plates 22 of Figure 4.
  • the in-plane and cross-plane thermoelectric generators 12, 14 may be integrated into a unitary structure which may, in turn, be electrically connected to an assembly comprising the initial and final energy management assemblies 40, 64 and the voltage converter 58.
  • the in-plane thermoelectric generator 12 may be provided in several arrangements including, but not limited to, a stack of thermopiles each comprising a substrate 26 having the thermoelectric legs disposed thereon and which are interconnected using metal bridges 30 and metal contacts 32.
  • the in-plane thermoelectric generator 12 may be arranged as a spiral of a continuous substrate 26 wherein a relatively large number of thermoelectric legs are connected in series wherein substrate 26 portions may be connected end to end using metal contacts 32 between the substrates 26 to electrically connect the thermoelectric legs in series.
  • the spiral or stack of the thermopile structure may have the heat couple plates 22 disposed on upper and lower ends in order to thermally connect to a heat source 18 and heat sink 20.
  • each of the components that make-up the thermoelectric power supply 10 may be integrated into a unitary structure and encapsulated to form a convenient assembly which may be adapted for use in many common microelectronic devices.

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  • Electromechanical Clocks (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
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  • Electrophonic Musical Instruments (AREA)
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Abstract

L'invention concerne une alimentation qui comprend un générateur thermoélectrique, un ensemble initial de gestion de l'énergie, un convertisseur électrostatique et un ensemble final de gestion de l'énergie. Le générateur thermoélectrique est conçu pour générer une énergie d'activation électrique présentant une tension suffisamment haute en réponse à un gradient de température agissant de part et d'autre du générateur thermoélectrique. L'ensemble initial de gestion de l'énergie est relié au générateur thermoélectrique, et il est conçu pour recevoir et conditionner l'énergie d'activation électrique produite par le générateur thermoélectrique. Le convertisseur électrostatique est relié à l'ensemble initial de gestion de l'énergie et peut être activé par l'énergie d'activation électrique reçue en provenance de celui-ci, et il est configuré pour générer de l'énergie électrique en réponse à de l'énergie de vibrations agissant sur lui. L'ensemble final de gestion de l'énergie est relié au convertisseur électrostatique, et il est conçu pour conditionner l'énergie électrique produite par celui-ci.
EP07795463A 2006-06-16 2007-05-30 Alimentation thermoelectrique Not-in-force EP2027609B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US81464806P 2006-06-16 2006-06-16
US11/511,563 US7626114B2 (en) 2006-06-16 2006-08-29 Thermoelectric power supply
PCT/US2007/012682 WO2007149185A2 (fr) 2006-06-16 2007-05-30 Alimentation thermoélectrique

Publications (3)

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EP2027609A2 true EP2027609A2 (fr) 2009-02-25
EP2027609A4 EP2027609A4 (fr) 2009-12-16
EP2027609B1 EP2027609B1 (fr) 2011-07-20

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US (1) US7626114B2 (fr)
EP (1) EP2027609B1 (fr)
JP (1) JP2009540796A (fr)
CN (1) CN101473460B (fr)
AT (1) ATE517438T1 (fr)
WO (1) WO2007149185A2 (fr)

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JP2009540796A (ja) 2009-11-19
CN101473460A (zh) 2009-07-01
EP2027609B1 (fr) 2011-07-20
US20070289620A1 (en) 2007-12-20
ATE517438T1 (de) 2011-08-15
EP2027609A4 (fr) 2009-12-16
CN101473460B (zh) 2010-09-08
WO2007149185A2 (fr) 2007-12-27
WO2007149185A3 (fr) 2008-10-16

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